Model of full-length T. thermophilus Translation Initiation Factor 2 refined against its cryo-EM density from a 30S Initiation Complex map
ELECTRON MICROSCOPY
| Sample |
|---|
| T. thermophilus 30S initiation complex with 30S, fMet-tRNA, IF2-GTP, IF1, and mRNA |
| Sample Components |
| Initiation Factor 2 |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK I |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Vitrification carried out in liquid ethane |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 13000 |
| Reported Resolution (Å) | 11.5 |
| Resolution Method | |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | cross-correlation coefficient | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | METHOD--cross-correlation gradient based REFINEMENT PROTOCOL--flexible fitting, dynamic elastic network | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI EAGLE (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 1.5 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2011-10-09 |
| Temperature (Kelvin) | 70 |
| Microscope Model | FEI TECNAI F30 |
| Minimum Defocus (nm) | -1500 |
| Maximum Defocus (nm) | -3500 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 59000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 150 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | DireX | |
| RECONSTRUCTION | EMAN | 2 |
| RECONSTRUCTION | IMAGIC | |
